SPREAD2 - adjust

#include <bits/stdc++.h>
#define MAX 1000007

using namespace std;

long long arr[MAX];
int main(){
    int q; scanf("%d", &q);
    int idx, day, n;
    long long pick;
    long long acum;
    while(q--){
        scanf("%d", &n);
        for(int i = 0; i < n; i++) scanf("%lld", &arr[i]);

        idx = 1;
        day = 0;
        pick = arr[0];
        while(idx < n){
            acum = 0;
            //cout << "ini ->" << idx << " " << pick << endl;
            for(long long i = pick; idx < n && i > 0; i--){
                acum += arr[idx++];
            }
            //cout << "fim -> " << idx << " " << acum << endl;
            pick += acum;
            day++;
        }
        printf("%d\n", day);
    }
    return 0;
}